A large feed production enterprise in Shandong produces 500,000 tons of livestock and poultry feed annually. Its feed pellet drying process has problems of high energy consumption and low thermal efficiency. The traditional hot air furnace direct heating method results in a drying energy consumption of 120kWh per ton of feed pellets.

Technical pain points

1. Thermal efficiency is only 65%, and a large amount of heat energy is wasted with exhaust gas emissions

2. Drying temperature fluctuates greatly (±15℃), affecting feed quality

3. Coal-fired boiler exhaust gas is directly discharged, and environmental pressure is high

Solution

Use high-efficiency shell and tube heat exchanger system for heat recovery:

1. Waste gas waste heat recovery

Install a stainless steel heat exchanger at the tail of the drying tower to exchange 300℃ exhaust gas with fresh air, and increase the preheating intake temperature from 20℃ to 180℃.

2. Two-stage heat exchange system

First-stage heat exchange: exhaust gas-air heat exchange

Second-stage heat exchange: steam condensate waste heat recovery

Comprehensive thermal efficiency increased to 85%

3. Intelligent control

PLC automatically adjusts the opening of the heat exchanger valve to keep the drying temperature stable at 105±3℃

Customer evaluation

"This heat exchange system not only saves energy costs every year, but more importantly, it makes the moisture content of our feed products more uniform and extends the shelf life by 15 days."--Wang Gong, the company's production director, said.

This case proves that heat exchangers can achieve significant energy savings in feed drying, waste heat recovery is an effective way to reduce carbon emissions in the feed industry, and temperature stability directly affects the final quality of feed.

In the future, heat pump technology can be combined to further increase the system energy efficiency to more than 90%, providing a more environmentally friendly drying solution for the feed industry.

 

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Old Customer Message
  • Diwak*** 2025-01-05

    Hello, our factory needs to purchase a high-efficiency chain furnace for drying grain. What models does your company recommend? Can you provide specific technical parameters and quotations?

  • Mehdil*** 2025-01-22

    Regarding your company's fuel hot air furnace, I would like to know how much combustion efficiency can be achieved? What is the approximate diesel consumption per hour? Is there any energy-saving and environmental protection certification?

  • Sipho*** 2025-02-15

    Our factory is in an area with strict environmental protection requirements. Does your company's heat source furnace meet the latest environmental emission standards? What are the emission reduction measures?

  • Tinas*** 2025-02-23

    I would like to know the energy consumption comparison between chain furnace and hot air furnace in the field of industrial drying. Can the fuel hot air furnace meet 24-hour continuous heating? Can you provide a quotation range for different models?​

  • Harma*** 2025-03-01

    We are a food processing factory, and we have high requirements for the cleanliness of the heat source. Do the emissions of the oil-fired hot air furnace meet environmental protection standards? Is there any supporting waste gas treatment plan? ​

  • Navee*** 2025-03-16

    How long is the maintenance cycle of the chain furnace? If there is a fault, how soon can the manufacturer arrange for technicians to come to the door for repair? Are the accessories supplied in time? ​

  • ThiTh*** 2025-03-29

    What is the temperature control accuracy of the hot air furnace? Can remote intelligent control be achieved? Our company plans to transform the production line and hopes to match the automation system. ​

  • Ashish*** 2025-04-06

    What kind of fuel does the oil-fired hot air furnace use? How much higher is the operating cost than the natural gas hot air furnace? Is there any energy-saving optimization plan? ​

  • Khang*** 2025-04-27

    We need to heat a 5,000 square meter factory building. What power of heat source furnace should we choose? Which is more suitable, the chain furnace or the hot air furnace? Can you provide a selection plan? ​

  • Roops*** 2025-05-04

    We need a hot air furnace with special specifications, the working temperature is required to reach 350℃, and the hot air volume is 8000m³/h. Can your company customize it? How long does the production cycle take?

  • Edwin*** 2025-05-11

    Does the installation of the heat source furnace require professional qualifications? Does your company provide installation and commissioning services? How long is the installation cycle? ​

  • Simra*** 2025-05-23

    How stable is the hot air furnace in extreme weather? If there is an emergency such as a power outage, how long does it take to restart the equipment? ​

  • Sagan*** 2025-06-08

    Currently, we are considering two types of equipment, chain furnace and hot air furnace, which are mainly used for wood drying. Can you make a comparative analysis from the aspects of energy consumption, efficiency, maintenance cost, etc.?

  • Baran*** 2025-06-16

    Our factory currently has a coal-fired hot air furnace and wants to purchase an oil-fired or natural gas hot air furnace. How much can the thermal efficiency be improved by using the oil-fired or natural gas hot air furnace?